Hi new to forums, Basically I want/need to upgrade my PC so i can play current gen games I really want to play Elder Scrolls:Oblivion on med-high settings on 1078x768(?) res. These are my specs Dell dimension 8400 3Ghz P4 512mb Ram X300 128mb I know i need to upgrade my Graphics Card I was thinking either a x1800xt for £170,7800gt xfx for £150 or 7900gt for £200. Please tell me if a RAM upgrade is necessary for one of these cards to perform well as i really have a tight budget. If it is could you guys advise me on which type of ram to buy? As its Dell i cannot overclock it please guys any help GREATLY APPRECIATED. I think those prices will rise next week please reply asap thx. PS. A 480w TrueBlue PSU should suffice?? thx.